The Proto-Turkic word *jɨlɨ-g
Word *jɨlɨ-g
Meaning warm
See also Proto-Altaic: *di̯ūlu ‘warm’
Synonyms *isɨg / isig

Comments
S. A. Starostin, A. V. Dybo, O. A. Mudrak - An Etymological Dictionary of Altaic Languages, 2003, Brill